<template>
  <div>
    <div @click="editCropper()" class="user-info-head"><img class="img-circle img-lg" title="点击上传头像"
                                                            v-bind:src="options.img"/></div>
    <el-dialog :title="title" :visible.sync="open" @close="closeDialog" @opened="modalOpened" append-to-body
               width="800px">
      <el-row>
        <el-col :md="12" :style="{height: '350px'}" :xs="24">
          <vue-cropper
            :autoCrop="options.autoCrop"
            :autoCropHeight="options.autoCropHeight"
            :autoCropWidth="options.autoCropWidth"
            :fixedBox="options.fixedBox"
            :img="options.img"
            :info="true"
            @realTime="realTime"
            ref="cropper"
            v-if="visible"
          />
        </el-col>
        <el-col :md="12" :style="{height: '350px'}" :xs="24">
          <div class="avatar-upload-preview">
            <img :src="previews.url" :style="previews.img"/>
          </div>
        </el-col>
      </el-row>
      <br/>
      <el-row>
        <el-col :lg="2" :md="2">
          <el-upload :before-upload="beforeUpload" :http-request="requestUpload" :show-file-list="false" action="#">
            <el-button size="small">
              选择
              <i class="el-icon-upload el-icon--right"></i>
            </el-button>
          </el-upload>
        </el-col>
        <el-col :lg="{span: 1, offset: 2}" :md="2">
          <el-button @click="changeScale(1)" icon="el-icon-plus" size="small"></el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}" :md="2">
          <el-button @click="changeScale(-1)" icon="el-icon-minus" size="small"></el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}" :md="2">
          <el-button @click="rotateLeft()" icon="el-icon-refresh-left" size="small"></el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}" :md="2">
          <el-button @click="rotateRight()" icon="el-icon-refresh-right" size="small"></el-button>
        </el-col>
        <el-col :lg="{span: 2, offset: 6}" :md="2">
          <el-button @click="uploadImg()" size="small" type="primary">提 交</el-button>
        </el-col>
      </el-row>
    </el-dialog>
  </div>
</template>

<script>
  import store from '@/store'
  import { VueCropper } from 'vue-cropper'
  import { uploadAvatar } from '@/api/system/user'

  export default {
    components: { VueCropper },
    props: {
      user: {
        type: Object
      }
    },
    data() {
      return {
        // 是否显示弹出层
        open: false,
        // 是否显示cropper
        visible: false,
        // 弹出层标题
        title: '修改头像',
        options: {
          img: store.getters.avatar, //裁剪图片的地址
          autoCrop: true, // 是否默认生成截图框
          autoCropWidth: 200, // 默认生成截图框宽度
          autoCropHeight: 200, // 默认生成截图框高度
          fixedBox: true // 固定截图框大小 不允许改变
        },
        previews: {}
      }
    },
    methods: {
      // 编辑头像
      editCropper() {
        this.open = true
      },
      // 打开弹出层结束时的回调
      modalOpened() {
        this.visible = true
      },
      // 覆盖默认的上传行为
      requestUpload() {
      },
      // 向左旋转
      rotateLeft() {
        this.$refs.cropper.rotateLeft()
      },
      // 向右旋转
      rotateRight() {
        this.$refs.cropper.rotateRight()
      },
      // 图片缩放
      changeScale(num) {
        num = num || 1
        this.$refs.cropper.changeScale(num)
      },
      // 上传预处理
      beforeUpload(file) {
        if (file.type.indexOf('image/') == -1) {
          this.$modal.msgError('文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。')
        } else {
          const reader = new FileReader()
          reader.readAsDataURL(file)
          reader.onload = () => {
            this.options.img = reader.result
          }
        }
      },
      // 上传图片
      uploadImg() {
        this.$refs.cropper.getCropBlob(data => {
          let formData = new FormData()
          formData.append('avatarfile', data)
          uploadAvatar(formData).then(response => {
            this.open = false
            this.options.img = process.env.VUE_APP_BASE_API + response.imgUrl
            store.commit('SET_AVATAR', this.options.img)
            this.$modal.msgSuccess('修改成功')
            this.visible = false
          })
        })
      },
      // 实时预览
      realTime(data) {
        this.previews = data
      },
      // 关闭窗口
      closeDialog() {
        this.options.img = store.getters.avatar
        this.visible = false
      }
    }
  }
</script>
<style lang="scss" scoped>
  .user-info-head {
    position: relative;
    display: inline-block;
    height: 120px;
  }

  .user-info-head:hover:after {
    content: '+';
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    color: #eee;
    background: rgba(0, 0, 0, 0.5);
    font-size: 24px;
    font-style: normal;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    cursor: pointer;
    line-height: 110px;
    border-radius: 50%;
  }
</style>
